SE441720C - Duplexoverforing med en kompensationskrets for undertryckning av den del av mottagningssignalen som henfores till egen utsend signal - Google Patents
Duplexoverforing med en kompensationskrets for undertryckning av den del av mottagningssignalen som henfores till egen utsend signalInfo
- Publication number
- SE441720C SE441720C SE7810979A SE7810979A SE441720C SE 441720 C SE441720 C SE 441720C SE 7810979 A SE7810979 A SE 7810979A SE 7810979 A SE7810979 A SE 7810979A SE 441720 C SE441720 C SE 441720C
- Authority
- SE
- Sweden
- Prior art keywords
- huk
- compensation circuit
- memory unit
- memory
- unit
- Prior art date
Links
- 238000012546 transfer Methods 0.000 title description 2
- 230000000754 repressing effect Effects 0.000 title 1
- 238000012937 correction Methods 0.000 claims description 10
- 230000005540 biological transmission Effects 0.000 claims description 5
- 239000003990 capacitor Substances 0.000 claims description 5
- 230000000694 effects Effects 0.000 claims description 5
- 102100034033 Alpha-adducin Human genes 0.000 claims description 4
- 101000799076 Homo sapiens Alpha-adducin Proteins 0.000 claims description 4
- 101000629598 Rattus norvegicus Sterol regulatory element-binding protein 1 Proteins 0.000 claims description 4
- 239000000853 adhesive Substances 0.000 claims 1
- 238000012986 modification Methods 0.000 description 5
- 230000004048 modification Effects 0.000 description 5
- 230000006870 function Effects 0.000 description 3
- 230000004044 response Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/02—Details
- H04B3/20—Reducing echo effects or singing; Opening or closing transmitting path; Conditioning for transmission in one direction or the other
- H04B3/23—Reducing echo effects or singing; Opening or closing transmitting path; Conditioning for transmission in one direction or the other using a replica of transmitted signal in the time domain, e.g. echo cancellers
- H04B3/231—Echo cancellers using readout of a memory to provide the echo replica
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Analogue/Digital Conversion (AREA)
- Radar Systems Or Details Thereof (AREA)
- Bidirectional Digital Transmission (AREA)
- Transceivers (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
- Dc Digital Transmission (AREA)
- Compression, Expansion, Code Conversion, And Decoders (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NO773627A NO140648C (no) | 1977-10-24 | 1977-10-24 | Direktiv kobler. |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| SE7810979L SE7810979L (sv) | 1979-04-25 |
| SE441720B SE441720B (sv) | 1985-10-28 |
| SE441720C true SE441720C (sv) | 1987-11-09 |
Family
ID=19883789
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SE7810979A SE441720C (sv) | 1977-10-24 | 1978-10-20 | Duplexoverforing med en kompensationskrets for undertryckning av den del av mottagningssignalen som henfores till egen utsend signal |
Country Status (14)
| Country | Link |
|---|---|
| US (1) | US4237463A (de) |
| AR (1) | AR217116A1 (de) |
| BR (1) | BR7807005A (de) |
| DE (1) | DE2846105C2 (de) |
| DK (1) | DK147564C (de) |
| ES (1) | ES474858A1 (de) |
| FI (1) | FI73552C (de) |
| GB (1) | GB2007946B (de) |
| GR (1) | GR65007B (de) |
| IN (1) | IN149319B (de) |
| MY (1) | MY8300052A (de) |
| NL (1) | NL185968C (de) |
| NO (1) | NO140648C (de) |
| SE (1) | SE441720C (de) |
Families Citing this family (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2920575C2 (de) * | 1979-05-21 | 1981-09-17 | Siemens AG, 1000 Berlin und 8000 München | Digital-Fernmeldesystem mit mindestens einem Vierdrahtleitungsabschnitt |
| GB2083977B (en) * | 1980-08-26 | 1984-08-22 | Standard Telephones Cables Ltd | Single channel duplex radio system |
| IT1144154B (it) * | 1981-03-09 | 1986-10-29 | Cselt Centro Studi Lab Telecom | Sistema di trasmissione simultanea bidirezionale su linea a due conduttori per telefono numerico |
| DE3116863C2 (de) * | 1981-04-28 | 1985-08-08 | Siemens AG, 1000 Berlin und 8000 München | Schaltungsanordnung zur Digitalsignal-Echokompensation |
| DE3121545C2 (de) * | 1981-05-29 | 1986-12-04 | Siemens AG, 1000 Berlin und 8000 München | Übersprech- u./o. Echo-Kompensationsschaltung |
| GB2123259A (en) * | 1982-06-25 | 1984-01-25 | Philips Electronic Associated | Digital duplex communication system |
| GB8427165D0 (en) * | 1984-10-26 | 1984-12-05 | British Telecomm | Adaptive recognising device |
| US4638473A (en) * | 1984-12-28 | 1987-01-20 | Gte Laboratories Incorporated | Two wire bidirectional digital transmission system |
| NL8600817A (nl) | 1986-03-28 | 1987-10-16 | At & T & Philips Telecomm | Adaptief filter voor het vormen van een echokompensatiesignaal in een zend-ontvangstelsel voor het in duplexvorm bedrijven van digitale communicatie over een enkel geleiderpaar. |
| NL8600815A (nl) * | 1986-03-28 | 1987-10-16 | At & T & Philips Telecomm | Inrichting voor het kompenseren van niet-lineaire vervorming in een te digitaliseren ingangssignaal en een echokompensatiestelsel voorzien van een dergelijke inrichting. |
| SE453627B (sv) * | 1986-06-17 | 1988-02-15 | Ellemtel Utvecklings Ab | Anordning for adaptiv ekoeliminering |
| NO875147L (no) * | 1987-05-12 | 1988-11-14 | Elektrisk Bureau As | Fremgangsmaate for konvertering av signalnivaaer, samt anordning for utfoerelse av fremgangsmaaten. |
| GB8719307D0 (en) * | 1987-08-14 | 1987-09-23 | Gen Electric Co Plc | Echo canceller |
| US5719856A (en) * | 1995-04-07 | 1998-02-17 | Motorola, Inc. | Transmitter/receiver interface apparatus and method for a bi-directional transmission path |
| US5887032A (en) * | 1996-09-03 | 1999-03-23 | Amati Communications Corp. | Method and apparatus for crosstalk cancellation |
| US6901070B2 (en) * | 2000-12-04 | 2005-05-31 | Gautam Nag Kavipurapu | Dynamically programmable integrated switching device using an asymmetric 5T1C cell |
| US11862194B1 (en) | 2022-12-01 | 2024-01-02 | International Business Machines Corporation | Adaptive data detection on a nonlinear channel |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3535473A (en) * | 1966-10-31 | 1970-10-20 | Bell Telephone Labor Inc | Self-adjusting echo canceller |
| US3566031A (en) * | 1968-12-23 | 1971-02-23 | Bell Telephone Labor Inc | Direct-current data set arranged for polar signaling and full duplex operation |
| US3696429A (en) * | 1971-05-24 | 1972-10-03 | Cutler Hammer Inc | Signal cancellation system |
| US3821494A (en) * | 1972-07-14 | 1974-06-28 | Ibm | Digital echo suppressor with direct table look up control by delta coded signals |
| US4144417A (en) * | 1975-03-07 | 1979-03-13 | Kokusai Denshin Denwa Kabushiki Kaisha | Echo cancelling system |
| US4126770A (en) * | 1975-11-07 | 1978-11-21 | Kokusai Denshin Denwa Kabushiki Kaisha | Echo canceller |
| US4087654A (en) * | 1975-11-28 | 1978-05-02 | Bell Telephone Laboratories, Incorporated | Echo canceller for two-wire full duplex data transmission |
-
1977
- 1977-10-24 NO NO773627A patent/NO140648C/no unknown
-
1978
- 1978-10-17 IN IN766/DEL/78A patent/IN149319B/en unknown
- 1978-10-20 US US05/952,984 patent/US4237463A/en not_active Expired - Lifetime
- 1978-10-20 SE SE7810979A patent/SE441720C/sv not_active IP Right Cessation
- 1978-10-20 FI FI783206A patent/FI73552C/fi not_active IP Right Cessation
- 1978-10-23 AR AR274187A patent/AR217116A1/es active
- 1978-10-23 DE DE2846105A patent/DE2846105C2/de not_active Expired
- 1978-10-23 NL NLAANVRAGE7810554,A patent/NL185968C/xx not_active IP Right Cessation
- 1978-10-23 DK DK471078A patent/DK147564C/da not_active IP Right Cessation
- 1978-10-23 ES ES474858A patent/ES474858A1/es not_active Expired
- 1978-10-24 BR BR7807005A patent/BR7807005A/pt unknown
- 1978-10-24 GB GB7841742A patent/GB2007946B/en not_active Expired
- 1978-10-24 GR GR57494A patent/GR65007B/el unknown
-
1983
- 1983-12-30 MY MY52/83A patent/MY8300052A/xx unknown
Also Published As
| Publication number | Publication date |
|---|---|
| BR7807005A (pt) | 1979-05-08 |
| GR65007B (en) | 1980-06-12 |
| NL185968B (nl) | 1990-03-16 |
| NO140648C (no) | 1983-03-29 |
| DE2846105A1 (de) | 1979-04-26 |
| FI783206A (fi) | 1979-04-25 |
| DK147564B (da) | 1984-10-01 |
| FI73552B (fi) | 1987-06-30 |
| SE7810979L (sv) | 1979-04-25 |
| NL185968C (nl) | 1990-08-16 |
| IN149319B (de) | 1981-10-24 |
| NO773627L (no) | 1979-04-25 |
| MY8300052A (en) | 1983-12-31 |
| DK471078A (da) | 1979-04-25 |
| ES474858A1 (es) | 1979-03-16 |
| NO140648B (no) | 1979-07-02 |
| GB2007946A (en) | 1979-05-23 |
| FI73552C (fi) | 1987-10-09 |
| AR217116A1 (es) | 1980-02-29 |
| SE441720B (sv) | 1985-10-28 |
| NL7810554A (nl) | 1979-04-26 |
| DE2846105C2 (de) | 1985-03-21 |
| GB2007946B (en) | 1982-03-24 |
| DK147564C (da) | 1989-10-23 |
| US4237463A (en) | 1980-12-02 |
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